The Following Data Relate to the Lisle Company for May

The following data relate to the Lisle Company for May and August of the current year: $\begin{array}{lrr} & \text { May } & \text { August } \\\text { Maintenance hours } & 25,000 & 29,000 \\\text { Maintenance cost } & \$ 1,175,000 & \$ 1,247,000\end{array}$ May and August were the lowest and highest activity levels, and Lisle uses the high-low method to analyze cost behavior. Which of the following statements is true?

A) The variable maintenance cost is $18 per hour.
B) The variable maintenance cost is $22 per hour.
C) The variable maintenance cost is $24 per hour.
D) The fixed maintenance cost is $72,000 per month.
E) More than one of the other answers is true.